after an insane amount of time using can paint, here's what I can tell ya..
after seeing the pics you got up top, you have to use thinner coats of paint, with more time in between to dry..
to be safe, hold the can a good 10 inches AWAY from ur rims, then wait 15-20 mins, then repeat, 2-3 times as needed. but really leave enough time in between and dont spray on too thick and you shouldn't have any problems with the cracks/orange peel.